Replace Mini Key Fob Batteries
It's relatively inexpensive and easy to replace the battery in your key fob. Be aware that it may require reprogramming or activated.
This will ensure that all settings on the new keyfob like mirror positions and seat positions, are connected to your car's Driver profile.
Battery

Modern key fobs are more convenient and practical than the traditional flip key or car remote. However, this innovation does not come without cost: the battery in your key fob will eventually degrade. If you hold off until it is completely dead, you may be stranded with no way to unlock your car. Replace the car key fob's battery as soon the power starts to fade.
You can make use of a key fob's led light to determine its battery's power. If the buttons on the key fob do not activate after pressing them then the battery is dead or dead-to-nearly dead. Fobs generally have small, coin-shaped batteries referred to as CR2025 or CR2032. You can purchase them at auto parts stores and home improvement stores and general stores. Ensure you purchase the correct type of battery as different fobs require different cell thicknesses.
You can also use a voltmeter to measure the voltage of a fob's battery. A voltmeter must read 3 Volts or higher for a quality battery. If the battery in your fob is less than 2.8 Volts it should be replaced. With the right tools, replacing the battery on your fob is easy. There are instructions in your owner's manual and numerous Youtube videos on the topic. Be careful not to damage any of the tabs made of plastic connecting the parts.
Chip
It may be time to replace the battery if your key fob does not turn on when you push the lock or unlock buttons. You can buy a new battery for your key at a hardware store, big-box retailer, or online. Most fob batteries are less than $10. Follow the directions in your owner's guide or on YouTube to replace the battery yourself.
Modern electronic key fobs are more convenient and useful than traditional metal keys. They also serve as a deterrent against car theft. It's important to deactivate your key fob when you lose it or break it. This will stop it from falling into the wrong hands.
The key fob is equipped with an integrated security chip that sends the signal to your car's ignition system. This disables the standard immobiliser in your engine control unit, allowing you to start your car without having the key. G28 Car Keys with this feature is expensive that ranges from $200 to $300.
Some models are updated with the switchblade key, which houses the metal portion of the key's plastic. These keys can be copied by a locksmith at a lower cost than a metal key, however a dealer must program the replacement in order to allow the car to start. Some dealers offer this service for free or at a cost of a small amount and others might charge the cost of. There are also websites that sell key fobs that are pre-programmed for sale at very low prices. These online retailers require buyers to provide proof of ownership prior to they can ship their item.
Reprogramming
The first thought that comes to mind when your key fob doesn't work is that it's damaged and will need to be replaced. Before you go to the dealer, you should examine a few things first.
Modern electronic key fobs offer greater convenience and function than a traditional key. They can open and close your vehicle's doors. They can also roll down your windows, summon your car, and even park your vehicle for you.
If your fob isn't working correctly, it might be time to replace its battery. A dead battery will usually cause the fob to malfunction, or even stop working completely. It's good to know that replacing the battery is a simple fix. Simply take out the battery that was in use and replace it.
A fob that is not functioning could have lost its driver profile. This feature enables the car to identify which driver is using the fob and adjusts car's settings in accordance with the driver profile. The feature is especially useful in the event that you have more than one driver in the household.
You can purchase an replacement key fob from a different manufacturer than your own, but you must choose a model that is compatible. The fob should have an additional program which connects to your specific car's immobiliser unit. There are replacement fobs available on the internet, however they may not function as well and could harm your immobiliser.
Replacement
Key fobs today do more than just unlock or lock the car. They are also a deterrent to theft and a security measure. They're also very complicated pieces of equipment, and are expensive to replace in the event that they get lost or damaged. While it is possible to get an old metal key cut at an locksmith, the newest smart keys must be programmed by a dealership and can run around $200.
Fortunately you can replace the battery in your BMW key fob is easy. You can purchase a brand new battery at an auto parts shop or big-box retailer, and it'll cost less than $10. You will need to remove the old battery, and then carefully open the case. Then you can insert the new battery. It's a good idea to consult your owner's manual for instructions before attempting this, since you don't want to force your case open and cause damage to it.
Some of the most sophisticated key fobs can roll down your windows, call or auto-park your vehicle. It is a good idea to assign Driver Profiles to a duplicate MINI keyfob you wish to gift to a friend or a different driver. This will allow you to alter their preferred settings for mirrors as well as seat and climate controls as well as other features.